On Leap 15.0 certain /dev/ttyUSBx devices are not showing up as expected. For
example, I attach a hub with e.g. two USB UART adapters:

Bus 004 Device 012: ID 10c4:ea60 Cygnal Integrated Products, Inc. CP2102/CP2109
UART Bridge Controller [CP210x family]
Bus 004 Device 011: ID 10c4:ea60 Cygnal Integrated Products, Inc. CP2102/CP2109
UART Bridge Controller [CP210x family]

but there's only a /dev/ttyUSB0 and no /dev/ttyUSB1.

This appears to be related to brltty, because "zypper rm brltty" and
re-plugging the hub fixes the issue. However, brltty appears to come back with
the next "zypper dup", so it's no permanent fix. The actual brltty@foo service
instance cannot be stopped either.

The accessibility pane in GNOME Control Center does not appear to offer any
options to disable this behavior. No related YaST module that I can spot
either.

Can we please get sane defaults again like in 42.3 and only activate such
destructive accessibility services when explicitly requested by the user?